珠三角地区秋季臭氧生成敏感性时空变化模拟研究  

Spatial and temporal distribution of ozone sensitive district in Pearl River Delta region during autumn

作　　者：叶绿萌 樊少芬 常鸣[1] 司徒淑娉 王雪梅[4] 

机构地区：[1]中山大学环境科学与工程学院,广州510275 [2]广州市环境科学研究院,广州510620 [3]佛山市环境监测中心,佛山528000 [4]中山大学大气科学学院,广州510275

出　　处：《南京大学学报（自然科学版）》2016年第6期977-988,共12页Journal of Nanjing University（Natural Science）

基　　金：科技部公益性行业(气象)科研专项(GYHY201406031);国家杰出青年科学基金(41425020);国家科技部支撑项目(2014BAC21B02);NSFC-广东联合基金(第二期)超级计算科学应用研究专题;佛山市科学技术局公共服务与能力提升项目(2015AB004371);佛山市环境保护局项目"佛山市臭氧污染成因与对策分析和大气颗粒物输送通道研究"(GDJAFS2015046G)

摘　　要：应用大气化学在线耦合模式WRF/Chem模式,对发生在珠三角地区秋季臭氧重污染事件进行了模拟.通过敏感性分析,划分臭氧敏感性区域,并研究敏感性区域随时间变化规律与成因.研究发现:在一定的气象条件和污染物排放情况下,VOCs敏感区主要分布在珠三角中心城区及其下风向地区(例如:佛山、中山、江门、珠海、深圳、广州南部以及肇庆南部地区),而NOx敏感区分布在珠三角的上风向郊区(例如:广州北部、惠州).珠三角臭氧敏感区表现出明显的时间变化特征,上午11-12时相较下午14-15时,VOCs敏感区域范围减少,NOx敏感区域范围增加且增幅达51.4%,其变化原因与生物源VOCs排放增加、气团老化、大气稀释扩散增加有关.Understanding the evolution of severe ozone pollution events is critical for managing public health issues. The Weather Research and Forecasting-Chemistry model（WRF/Chem）is used to study a severe ozone-pollution episode occurred in autumn 2009 over the Pearl River Delta（PRD）.Through analyzing WRF/Chem sensitivity simu-lations,NOx and VOCs-sensitive regimes of ozone chemistry are discerned to assess the mechanisms controlling the time variation of sensitive regimes.The results show that,for given weather and pollution-emission conditions,the VOCs-sensitive regime is mainly located in the central PRD and in its downwind areas （i.e.,the southern＆amp;nbsp;Guangzhou,Foshan,Zhongshan,Zhuhai,Shenzhen,Dongguan,Jiangmen and Zhaoqing）.The NOx-sensitive regime is located in the upwind areas（i.e.,northern Guangzhou and Huizhou）.These sensitive regimes are characterized with significant diurnal variations,and some areas that are previously VOCs sensitive shifted to NOx-sensitive conditions from morning to afternoon by 5 1 .4%.Such a shift can be attributed to the photochemical aging,increased vertical di-lution,and increasing biogenic VOCs emission.

关 键 词：珠三角地区 臭氧 敏感区 PEARL RIVER Delta(PRD) 

分 类 号：TP181[自动化与计算机技术—控制理论与控制工程]